There have been some really cool, secretive units throughout history. Here is a great video from the guys over at We Are The Mighty showcasing some you probably don’t know about.

Secrecy is one of the best currencies in war, so it’s sometimes best for commanders to keep their best assets hidden from the enemy and the public. While the military has admitted that most the units on this list existed at some point, a lot of their missions were classified for decades before being disclosed to the public. For the units that are still operating, America still only gets glimpses into their activities.

-Were you aware of some of these more secretive units?